Metallic power-belt.



l E'. 1.3011111111.' METALLIC 'POWER BELT.

API'JLIGAT'IONFI'LED MAY 23,1912.

Patented 0013.13, 1914.

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nnnnsra. contaran, or eenen Barrios, iowa, .essreuoa' To Janes n. olf-loner, JR.,

. or CHICAGO, rLLrNors.

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To all whom it may concern.'

Be it known thatl, ERNEST A. Borna/IAN,

a citizen of the United States, residing at Cedar lRLapids,` in the county of Linn and State of lowa, have invented certain new and useful limprovements in Metallic Powerldelts, of which the following is a specification.

'llhis invention relates in general to power belts for transmitting power fromrone pulleyto` another and, more particlilarly, to that class of belts known aspch'ain belts and aims to provide a belt of thistypewhiich will.

be strong,vdurable and ecient and at the same time su'fliciently flexible so that it may- Referring to the drawings Figure 1 is aside elevation of a section of abelt showing its relation to the pulley around which it travels; Fig. 2 is a plan view thereof@ Fig. il is a longitudinal sectional view; Fig. l is a transverse sectional v'iew onthe line 4.*-4

of lligfl; Fig. 5 is a similar view on the linev 5`5 of Eig. 1; and Fig. 6 is a. detail perspective' view of the-parts comprising the anti-friction connection between the pins andthe links.

@n the drawings 11 designates a power pulley provided with a peripheral V-shaped slot or groove 12 for the reception of my 1mproved belt. The belt is made up of alternately Varranged links 13iand side bars 14 disposed in pairs on opposite sides of the links. Each pair of side bars is connected together at its ends by pins or pintles 15 which projectthrough bearing openings or apertures formed in the ends of the links.

f rEhe ends of the pintles are preferably Hattened, as indicated by 16, and the holes in the side bars into which these ends projectv similarly shaped so that the pins are ,prevented from turning in the bars. The

Specification of Letters Patent. Pay-kenibwdl (Umb, 11,39 figli-(l0 Application filed May 23,

191e. serial no. 699,152. l

pins may besecurely and rigidly fastened in the side bars by drivingthem in or expanding the ends of the pins, or compressing the side bars aroundv them. The central portion of each pin disposed Within the link is cy .lindrical in shape and-around .this portion is Varranged a series of antiefriction bearingrollers 17 which, 1n turn. are encircled by a cylindrical housing-18 adapted to fit within they aperture in the link. *A pair `of'dislrsy .19 adapted to fit over the ends vof thepin are positioned between theends ofthe bearing rollers andthe inner faces of theside bars whereby the rollers are held against longitudinal displacement and maintained proper position. This construction pro- Vde a lvery flexible joint betweenthc Side' bars and the linksl and permits the belt to run freely and-without cramping or binding and, also, provides avery iexiblezjoint which adapts the' belt for use on pulleys of small diameter. l

For the purpose of securing friction be A`tween the sides of the belt and the sides of the pulley groove, l mount upon the top of each pair 'of side bars a friction block 21 composed of .stiff leather, or other frictional material and, to the bottom of each pair of side bars, 'l secure a strip of canvas, leather, or other frictional material 22 the free ends of which project up over the outer faces of the 'side bars in position to frictionally engage with the sides of the pulley grooves. The block 21` is held in position by .shoulders ordips 23 struck up from the tops of the side bars in position to be inserted into the bottom of the block. A metal plate 24 provided with suitable apertures to itover the lips 23 is interposed (between the tops of the bars and the block to prevent wearing of the bottom: face of theblock, A top plate 25 is disposed over the top o f the block and a eXible,anti-friction bearing is provided beioo - in which the bearing since'dust and grit will collectI in the oil and eventually work into the bearings. In the present construction the bearings are interposed. rollers and these rollers are entirely closed by the housing 18 and the disks anti-frictional in nature by reason of thc 19 so that dust and dirt are excluded.

'It is ybelieved that my invention and its operation Will be understood from the foregoing Without further description and it will be obvious that the structural details advantages thereof.

.may be varied Within considerable limits Without departin from the spirit of the invention or sacri cing any of the material I claim:

The combination of a pair of sidemembers having apertureseach provided with a pair of op ositely disposed parallel walls, a cylindricalppin having flattened ends adapted to lit tightly in said apertures, a central member mounted to pivot on said pin and having a perforation through which said pin .is disposed, a cylindrical casing of length less than the width ot' said central member disposed -in said perforation, a lurality of anti-friction elements dispose in said casing and surrounding said pin, and a pair of disks of diameter greater than the internal diameter of said casing -iitting in the ends of said perforations and provided at their centers with apertures shaped to lit snugly the flattened ends of said pins, whereby said pin, sidebars and disks are rigidly held together and the disks in Contact with the ends of said casing.

ERNEST A. BOHLMAN. 'Witnessesz J oHN R. MCGUIRE, WILLIAM F. CAGNEY. 

